doray



(Model?) J. B. & s. DORAY.

NUT LOOK.

No. 247,487. Patented Sept. 27,1881.

UNITED STATES PATENT OFFICE.

JEAN B. DORAY AND SAMUEL DORAY, OF SUTTON FLAT, QUEBEC, CANADA,

ASSIGNORSOF ONE-THIRD 'IO JOSEPH T. LANGLOIS,

OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 247,487, dated September 27, 1881.

. Application filed July :23, 1881. (ModeL) To all whom it may concern Be it known that we, JEAN B. DORAY and SAMUEL DORAY, of Sutton Flat, in the Province of Quebec, Dominion of Canada, have invented certain Improvements in N ut-Locks, of

which the following is a specification.

Our invention relates to nut-locks; and it at one or nuts perforated to receive a retaining-bolt, and provided with a depression around the perforation to receive the head of said .bolt and to hold the bolt against turning.

The invention further consists in a plate to be placed and held beneath or behind the nut or nuts,'and;tapped to receive the retaining bolt or screw, whenfor any reason the body to which the nut is applied cannot be advantageously tapped to receive said bolt.

In the accompanying drawings, Figure 1 represents a perspective view of our improved device applied to a fish-plate of a railway-rail; Fig.2, alongitudinal horizontal section through the same; Figs. 3 and 4, perspective views of two slightly-difiering forms of the lockingplate.

The object of ourlinvention is to provide a cheap and efficient nut-lock which may be applied without the use of special tools, and which, though locking the nuts firmly when in use, may be easily and quickly removed when desired.

Referring to the drawings, A represents a section of rail; B, a fish-plate applied thereto and secured by bolts 0, the nuts D of which are locked by our locking-plate E, as shown. This locking-plate consists of a strip of sheet metal possessing a greater or less degree of elasticity, notched at its end or ends to engage with or receive the sides or corners of a nut or nuts, and perforated at a point about midway between its ends to receive a retaining bolt or screw, F. The hole a, through which the bolt passes, is circular in form, but the metal surrounding said hole is depressed, as shown at b-in Figs. 2, 3, and 4, to form a seat or cavity corresponding in form with the head of the retaining bolt or screw. As said bolt or screw is turned the spring-plate E is compressed, and

head of the retaining bolt or screw,

forming an angular cavity or its ends are pressed firmly against the nuts, while the middle portion, pressing outward, causes the recess'or seat I) to surround the its sides engaging the sides of said bolt-head, and thereby preventing its turning except when considerable power is appliedthereto, as when a wrench or like tool is used. When the plate is to hold or look two nuts it is placed between them, and has both ends notched or otherwise shaped to hold the not; but when only one is to be locked it is only necessary that one end shall be thus formed. It is apparent, however, that the plate notched at both ends may be used to hold or look a single nut.

It sometimes happens that the body to which the main bolts are applied is not of sufficient solidity or from other cause is not adapted to receive the retaining boltor screw F. In such cases a special plate, G, will be placed beneath the nut or nuts and tapped to receive the retaining bolt or screw, as shown in Figs. 1 and 2, said plate G being formed with spurs or projections on its rear face to engage with the body to which it is applied, as shown in Fig. 2. The locking of the plate may be effected by seat around the bolt-hole in the body to which the bolt is applied, and forming lips or burrs around the hole in said plate to enter the recess or seat. When applied to two bolts the plate G may be perforated and passed over each, in which case the studs or projections on omitted.

It is desirable to form the plate G of thin band or sheet iron to save expense; and in order to give suflicient hold for the retaining bolt or screw, the metal may be heated and punched in such manner as to produce a tubular neck or collar, 0, in which a suficiently long thread may be formed to afford adequate 0 hold for the bolt.

We are aware that a locking-plate has been provided with a notched end to engage with one bolt and a perforated end to engage with another, the plate being released by being 5 sprung out from the first and turned with the second out, and we are also aware that two plates have been employed for lockin g two sets its back may be of nuts, one plate pivoted to the other, and the latter being provided with lips to hold the outer plate against turning and being also held beneath one set of the nuts. Such constructions we do not claim.

Having thus described our we claim is- 1. Theherein-described nut-lock, consisting of an elastic plate notched at its end or ends, and provided with a hole to receive an independent retaining-bolt, and with a seat or depression to receive the head of said retainingbolt, substantially as shown and described, whereby the retaining-bolt is held normally against turning, but is permitted to be turned invention, what upon the application of a moderate pressure thereto without moving the plate.

2. In combination with a nut or nuts,

a plate placed behind the. same, tapped to receive a retaining bolt or screw, and provided with 20 spurs to engage with the body behind it, and a spring-plate adapted to engage with the nut or nuts, perforated to receive the retaining bolt or screw, and provided with a seat or cavity to receive the head of the bolt or screw and hold it against turning.

3. In combination with the elastic locking plate and its retaining-bolt, the plateGr, formed with the tubular neck a, threaded on its in terior as and for the purpose set forth.

JEAN BAPTISTE DORAY. SAMUEL DORAY.

\Vitnesses:

NAPOLEON HUART, J. Br L. B. ATnALoN. 

